ILThermo:  A Free-Access Web Database for Thermodynamic Properties of Ionic Liquids

Abstract

The development, scope, and functionality of the Web-based ionic liquids database, ILThermo, are described. The database is available free to the public and aims to provide users worldwide with up to date information from publications of experimental thermophysical properties for ionic liquids, including numerical property values, measurement methods, sample purities, purification methods, and uncertainties. The database can be searched in terms of the ions constituting the ionic liquids, the ionic liquids themselves, and their properties and through literature citation information

Revisiting physico-chemical hazards of ionic liquids

“…These models were based on structure-property relationships, in which structure was simply described by elemental mass composition descriptors and related models obtained from multilinear regression [60], there are no data at all available for heats of combustion of ILs. From the examination of the 18 correlations, 5 of those were revealed to be quite effective for predicting reasonable heats of combustion of ILs (R 2 > 0.94).…”

Physico-Chemical Properties of Non-Newtonian Shear Thickening Diisopropyl-ethylammonium-Based Protic Ionic Liquids and Their Mixtures with Water and Acetonitrile

“…Generally, ILs are described as Newtonian fluids; in other words, their viscosities remain constant with increasing shear rates. 4,6,42,44 For example, Newtonian behaviors for alkylimidazolium (with the alkyl chain length between 1 and 8 carbon atoms) based ILs with tetrafluoroborate, hexafluorophosphate, and bis(trifluoromethylsulfonyl)imide anions are reported in the literature. 5,42,44,[46][47][48] Nevertheless, this rheological behavior is strongly affected by the choice of ions constituting the IL.…”

“…For the PILs studied herein, the zero shear viscosity increases when the alkyl chain length on the anion increases: η 0 = 12.23 mPa 3 s for [DIPEA][C 6 COO] and η 0 = 13.52 mPa 3 s for [DIPEA] [C 7 COO], at 298.15 K. Such a trend is in good agreement with the variation in viscosity with the PIL structure previously reported. [4][5][6]16 Furthermore, the nature of ions affects strongly the rheological behavior and in fact the viscosity of the PILs. For example, the pyrrolidinium octanoate-based PIL is Newtonian (at 298.15 K; η = 36.5 mPa 3 s), 41 but by changing the cation, as reported herein, to the [DIPEA] þ cation, the PIL becomes less viscous but non-Newtonian (at 298.15 K; η 0 = 13.52 mPa 3 s).…”

A Group Contribution Method for Predicting the Freezing Point of Ionic Liquids

“…Data were selected from specific databases and correspond to those claimed as experimentally determined with uncertainties below than ±1 K. Data available in the literature obtained from theoretical methods, correlations or extrapolations of any kind were not considered. Data which accuracy were determined by the authors as not able to be guaranteed for any reason (presence of impurities, fluid instability, or equipment problems) were not considered [21].…”